80 Bulletin, VanderMU Marine Museum, Vol. II 



Synonymy. — Microrhynchus depressus Bell, Proc. Zool. Soc. London, 

 vol. 3, p. 88, 1835 ; Trans. Zool. Soc. London, vol. 2, p. 42, pi. 8, 

 figs. 2, 2d-f, 1836. 



Neorhynchus depressus A. Milne Edwards, Crust. Reg, Mexico, p. 

 187, 1880. 



Dasygius depressus Rathbun, Proc. U. S. Nat. Mus., vol. 21, p. 570, 

 1898 ; ihid., vol. 38, p. 571, 1910 ; Bull. 129, U. S. Nat. Mus., p. 

 138, pi. 1, pi. 274, figs. 5-8, 1925.— Boone, Zoologica, N. Y. Zool. 

 Soc, VIII, No. 4, p. 136, fig. 37, 1927. 



Subfamily: Pisinae. 

 Genus: HYAS Leach. 

 Hyas coarctatus Leach. 



Plate 23. 



Names : Harper (Leach) ; toad crab, common name among Ameri- 

 can fisher-folk. 



Diagnostic characters: Carapace lyrate, with the rostrum pro- 

 duced, subtriangulate ; the postorbital — hepatic region laterally pro- 

 duced into a laminate expansion with undulating margin, rounded 

 posteriorly. The basal antennal article narrows anteriorly but it with- 

 out a decided tubercle. 



Type: Dr. Leach's type localities are stated as follows: "In mari 

 Britannico; apud Firth of Forth, Plymouth Sound et Salcomle." Dr. 

 Caiman of the British Museum staff states that the supposed syntypes 

 of this species with an incomplete label are deposited in this insti- 

 tution. 



Distribution: This species is known from the Arctic shores of 

 Europe, Greenland, Iceland, America, Asia; also in the American 

 waters of the Bering Sea and southward to Lat. 56° 10'; from Kamt- 

 chatka southward to Korea and Shanghai ; on the shores of northern 

 Europe southward to about Lat. 49° 5' N., and on the eastern Ameri- 

 can shores down to Cape Hatteras, N. C. Bathymetric occurrence: 

 low water to 373 fms., more rarely at 906 fms. 



Material examined : Two females of this typical form were dredged 

 in the upper end of White Haven Harbor, Nova Scotia, September 6, 

 1926, by the yacht ''Ara," William K. Vanderbilt, commanding. 



